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GOODWILL AND INTANGIBLE ASSETS (Tables)
 6 Months Ended
Jun. 30, 2025
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Goodwill and Intangible Assets
Goodwill and intangible assets consist of the following:

(in millions)6/30/202512/31/2024
Goodwill$2,642.8 $2,642.8 
Indefinite-lived intangible asset - trade name86.0 86.0 
Indefinite-lived intangible asset - investment advisory agreement62.3 65.6 
Definite-lived intangible assets - investment advisory agreements168.6 216.5 
Total$2,959.7 $3,010.9 
Schedule of Definite-Lived Intangible Assets, Future Amortization Expense Estimated amortization expense for the definite-lived intangible assets for the five succeeding years is as follows:
(in millions)
Remaining 2025
$41.4 
202655.9 
202739.1 
202811.8 
20298.8